Product description

Grandstream GBX20 expansion module (GBX20) is an original Grandstream IP phone accessory. Expansion Module. Designed for office, hotel, and network infrastructure. It is an original Grandstream model; offered with official warranty and delivery. Model: GBX20 Type: Expansion Module Compatibility: GXV3350, GRP2615, GRP2624 Buttons: 20 dual-color + 2 arrow (40 kontakt/extension) Daisy-chain: 4 × GBX20 up to